<div dir="ltr">On Wed, Aug 13, 2008 at 8:34 PM, Brett Henderson <span dir="ltr"><<a href="mailto:brett@bretth.com">brett@bretth.com</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Jochen Topf wrote:<br>
> Hi!<br>
><br>
> When creating excerpts of OSM data with Osmosis, Osmosis will (depending<br>
> on flags) chop of ways, i.e. the output will contain ways with only some<br>
> of the nodes in the way. But looking at the XML there is no way to tell<br>
> that this has happened. The way still has the same ID and timestamp.<br>
> There should be a way of recognizing theses chopped of ways, say by<br>
> adding an incomplete="true" attribute or something.<br>
><br>
> This question came up on the German mailing list after somebody had used<br>
> the excerpt as basis for some automated fixing of data. He (IMHO correctly)<br>
> checked the Osmosis excerpt with current data from the API by comparing<br>
> the timestamps which were the same. So he assumed nothing had changed<br>
> and he could safely edit the data. But because of the excerpt process<br>
> the data he based his decision on, was not correct.<br>
><br>
> This is part of a larger problem. Say you create an extract with only<br>
> some of the tags or a relation with only some members.<br>
><br>
> Jochen<br>
><br>
I made a mistake making way truncation the default behaviour. I intend<br>
to fix this but feel free to raise a defect in TRAC.<br>
</blockquote></div><br>Even still, it's a valid concern and there are other operations (i.e., cutting into tiles or tag transforms) that can manipulate the data into a form that probably shouldn't be uploaded.<br>
<br>Karl<br></div>